Webcaffeine concentration translation in English - English Reverso dictionary, see also 'caffein, caff, café, cafetiere', examples, definition, conjugation WebSep 8, 2024 · What is caffeine? Caffeine is a bitter substance that occurs naturally in more than 60 plants including: Coffee beans; Tea leaves; Kola nuts, which are used to flavor soft drink colas; Cacao pods, which are …
caffeine meaning of caffeine in Longman Dictionary of …
WebSep 11, 2024 · caffeine. (n.) trimethyl-derivative of xanthine, 1830, from German Kaffein, coined by chemist F.F. Runge (1795-1867), apparently from German Kaffee "coffee" (see coffee) + chemical suffix -ine (2) (German -in ). So called because the alkaloid was found in coffee beans; its presence accounts for the stimulating effect of coffee and tea. Webcaffeinism: [ kaf´ēn-izm ] 1. physical dependence on caffeine . 2. a disorder associated with excessive intake of caffeine , defined as the presence of five or more of the following symptoms: restlessness, nervousness, excitement, insomnia, flushed face, diuresis, gastrointestinal disturbance, muscle twitching, rambling flow of thought and ... helly hansen men\u0027s ullr sogn cargo pants
Caffeine consumption definition and meaning - Collins Dictionary
Web2 days ago · caffeine in British English or caffein (ˈkæfiːn , ˈkæfɪˌiːn ) noun a white crystalline bitter alkaloid responsible for the stimulant action of tea, coffee, and cocoa: a constituent of many tonics and analgesics. Formula: C 8 H 10 N 4 O 2 See also xanthine (sense 2) Collins English Dictionary. Copyright © HarperCollins Publishers Word origin WebOct 19, 2024 · Caffeine is a stimulant that may be found in beverages, supplements, and medications. Common food sources include coffee, chocolate, green tea, and soft drinks. While caffeine addiction is not considered a real addiction, it can cause withdrawal symptoms, such as headaches, tiredness, decreased energy, sleepiness, depressed … WebMar 22, 2024 · caffeine, nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, maté, kola nuts, and cacao. Pure caffeine (trimethylxanthine) occurs as a white powder or as silky needles, which melt at 238 °C (460 °F); it sublimes at 178 °C (352 °F) at atmospheric ... helly hansen men\\u0027s swift 3l shell jacket